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Correlation of Predicted and Measured Slope Erosion
This paper presents calculated wave heights and predicted erosion of upstream earth dam slopes at the L-8 Reservoir during Hurricane Jeanne in September 2004. The predictions are compared with actual measurements of slopes erosion following the hurricane. The methodology used in this study includes application of the USACE (2006) Coastal Engineering Manual method for wave run-up and overtopping computation, the SWAN wave model, and the SBEACH erosion model. During Hurricane Jeanne, the north interior slopes of the perimeter dam experienced significant erosion due to wave action. Using hurricane parameters from NOAA, the SBEACH model was used to predict the final configuration of the eroded slopes. By comparing the predicted slope configuration to photographs taken following the hurricane, it was seen that the model output closely resembled the actual damaged slope profile. This comparison provided a calibration of the SBEACH model that was then used to design the final reservoir slopes and to determine recommended operating levels prior to the passage of future hurricanes. The analytical modeling tools used for the L-8 Reservoir study have recently been extended to an analysis of placing expendable soil over stair-step soil cement armoring on an upstream dam slope. The purpose of expendable soil is to allow small animal ingress and egress from the water reservoir.
Correlation of Predicted and Measured Slope Erosion
This paper presents calculated wave heights and predicted erosion of upstream earth dam slopes at the L-8 Reservoir during Hurricane Jeanne in September 2004. The predictions are compared with actual measurements of slopes erosion following the hurricane. The methodology used in this study includes application of the USACE (2006) Coastal Engineering Manual method for wave run-up and overtopping computation, the SWAN wave model, and the SBEACH erosion model. During Hurricane Jeanne, the north interior slopes of the perimeter dam experienced significant erosion due to wave action. Using hurricane parameters from NOAA, the SBEACH model was used to predict the final configuration of the eroded slopes. By comparing the predicted slope configuration to photographs taken following the hurricane, it was seen that the model output closely resembled the actual damaged slope profile. This comparison provided a calibration of the SBEACH model that was then used to design the final reservoir slopes and to determine recommended operating levels prior to the passage of future hurricanes. The analytical modeling tools used for the L-8 Reservoir study have recently been extended to an analysis of placing expendable soil over stair-step soil cement armoring on an upstream dam slope. The purpose of expendable soil is to allow small animal ingress and egress from the water reservoir.
Correlation of Predicted and Measured Slope Erosion
Bromwell, Les (author) / Ying, Kenneth (author)
International Conference on Scour and Erosion (ICSE-5) 2010 ; 2010 ; San Francisco, California, United States
Scour and Erosion ; 1043-1053
2010-10-29
Conference paper
Electronic Resource
English
Correlation of Predicted and Measured Slope Erosion
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